For more information, contact:

Chris Fergen
Tower Electronics
Marna Shillman
Advanced Energy Industries, Inc.

Advanced Energy's Tower Electronics Names Howard Ellberger Director of Sales and Marketing

Voorhees, New Jersey (November 15, 2000)—Advanced Energy Industries, Inc. (Nasdaq: AEIS) subsidiary Tower Electronics, Inc. has named Howard Ellberger Director of Sales and Marketing for Tower Electronics in Voorhees, New Jersey. Mr. Ellberger has responsibility for all of Tower's strategic and tactical marketing and sales activities. In announcing the new appointment, AE Vice President Chris Fergen, Tower's General Manager, said, "Howard brings the experience and expertise we need to refocus our efforts in the semiconductor, telecommunications, medical, and industrial markets."


Mr. Ellberger's immediate task is to establish and grow Tower's direct and representative sales forces for custom power supplies across North America, Asia, and Europe. His longer-term responsibility will be to develop Tower's strategic global marketing plans.

Mr. Ellberger brings 25 years of high technology and professional sales experience. Before joining Tower Electronics, Mr. Ellberger worked in sales and marketing with Hewlett Packard and Agilent in test and measurement equipment.

Advanced Energy is a global leader in the development, marketing, and support of integrated technology solutions that are central in the manufacture of semiconductors, data storage products, and flat panel displays as well as other mission-critical power applications. Original equipment manufacturers and end- users around the world depend on AE products when plasma-based technology plays a vital role in their manufacturing process. AE offers a comprehensive suite of key subsystems for vacuum process systems including power conversion and control solutions, process monitoring and machine control tools, ion-beam sources, dynamic temperature control and measurement products, and plasma abatement technologies. AE technology solutions are sold and supported globally by direct offices, representatives, and distributors. Founded in 1981, AE is a publicly held company traded on Nasdaq under the symbol AEIS.